There is evidence of the exchange of obsidian and flint during the stone age.

They used small tools made of flint or bone, which have been found near the coast.

Cerium is a major component of ferrocerium, also known as lighter flint.

It is common to find flint and chert nodules embedded in chalk.

British Dictionary definitions for flint

flint

/flɪnt/

noun

1.

an impure opaque microcrystalline greyish-black form of quartz that occurs in chalk. It produces sparks when struck with steel and is used in the manufacture of pottery, flint glass, and road-construction materials. Formula: SiO2

2.

any piece of flint, esp one used as a primitive tool or for striking fire

3.

a small cylindrical piece of an iron alloy, used in cigarette lighters

4.

Also called flint glass, white flint. colourless glass other than plate glass

abounds in all the plains and valleys of the wilderness of the forty years' wanderings. In Isa. 50:7 and Ezek. 3:9 the expressions, where the word is used, means that the "Messiah would be firm and resolute amidst all contempt and scorn which he would meet; that he had made up his mind to endure it, and would not shrink from any kind or degree of suffering which would be necessary to accomplish the great work in which he was engaged." (Comp. Ezek. 3:8, 9.) The words "like a flint" are used with reference to the hoofs of horses (Isa. 5:28).